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lib/base/database/DataBase.dart

@@ -0,0 +1,36 @@
+abstract class DataBase {
+  static late DataBase _dataBase;
+
+  static DataBase getInstance() {
+    return _dataBase;
+  }
+
+  static void setInstance(DataBase database) {
+    _dataBase = database;
+  }
+
+  // 执行查询操作
+  Future<List<Map<String, dynamic>>> query(String table, {dynamic condition});
+
+  // 执行插入操作
+  Future<void> insert(String table, Map<String, dynamic> data);
+
+  // 执行更新操作
+  Future<void> update(
+      String table, Map<String, dynamic> data, dynamic condition);
+
+  // 执行删除操作
+  Future<void> delete(String table, dynamic condition);
+}
+
+class DataBaseConfig {
+  String host;
+  String userName;
+  String password;
+  String dataBase;
+  DataBaseConfig(
+      {required this.host,
+      required this.userName,
+      required this.password,
+      required this.dataBase});
+}

lib/base/database/impl/MongoDb.dart

@@ -0,0 +1,51 @@
+import 'package:EasyDartModule/base/database/DataBase.dart';
+import 'package:mongo_dart/mongo_dart.dart';
+
+class MongoDb implements DataBase {
+  final DataBaseConfig config;
+  final Db db;
+  MongoDb(this.config)
+      : db = Db(
+            "mongodb://${config.userName}:${config.password}@${config.host}/${config.dataBase}?authSource=admin") {
+    Future.delayed(Duration(seconds: 1), () async {
+      do {
+        try {
+          await db.open();
+          print('Connected successfully!');
+        } catch (e) {
+          print('Connection error: $e');
+          await Future.delayed(Duration(seconds: 1));
+        }
+      } while (!db.isConnected);
+    });
+  }
+
+  DbCollection getCollection(String name) {
+    return db.collection(name);
+  }
+
+  @override
+  Future<void> delete(String table, dynamic condition) async {
+    await getCollection(table).deleteMany(condition);
+  }
+
+  @override
+  Future<void> insert(String table, Map<String, dynamic> data) async {
+    await getCollection(table).insert(data);
+  }
+
+  @override
+  Future<List<Map<String, dynamic>>> query(String table,
+      {dynamic condition}) async {
+    if (condition == null) {
+      return await getCollection(table).find().toList();
+    }
+    return await getCollection(table).find(condition).toList();
+  }
+
+  @override
+  Future<void> update(
+      String table, Map<String, dynamic> data, dynamic condition) async {
+    await getCollection(table).update(condition, data);
+  }
+}